Simple CORS workaround for local development

I've been doing a lot of web development old school, just editing HTML and JavaScript by hand without a build environment. Running npx live-server is an easy one liner to spin up a server, that opens a browser for you and also updates changes on safe.

Sometimes that's not enough. Often you want to pull in data from an API, and that requires HTTPS, and also you need to work around CORS limitations. Here's a simple way to do that.

First create a local certificate in /tmp if it's not there
Run http-server

Option	Reason
`--cors`	Enable CORS via the Access-Control-Allow-Origin header
`-S`	Enable https
`-P`	Proxy unhandled requests to `https://tezlabapp.com`
`-c-1`	Turn off caching
`-C /tmp/cert.pem`	Certificate file
`-K /tmp/key.pem`	Key file

Here's something you can stick in your path to run it.

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#!/bin/bash
if [ ! -f /tmp/key.pem ]; then
  echo Creating key
  openssl req -newkey rsa:2048 -new -nodes -x509 -days 3650 -keyout /tmp/key.pem -out /tmp/cert.pem -batch
fi

npx http-server --cors -S -P https://tezlabapp.com -c-1 -C /tmp/cert.pem -K /tmp/key.pem